الغيرة التجارية تُثار، وتُذكي نفسها بدورها، بعنف العداوة القومية وتزداد اشتعالًا بها.

“Mercantile jealousy is excited, and both inflames, and is itself inflamed, by the violence of national animosity.”Adam Smith — Aninquiry in to the Nature and Causes of the Wealth of Nations: With a Life of the Author, an Introductory Discourse, Notes, and Supplemental Dissertations by J.R. McCulloch (1828)